Microsoft booking disappearing calendar events

Can someone help me!!  I am using Microsoft booking to create a team calendar, we use a shared mailbox because I want my team availability no impacted by the bookings in the facility visits. So I need my team able to see all the participants per event in the calendar, however some of them when they click on calendar under booking, it shows all the bookings events for just a second and disappear. I tried changing permissions, changing calendars, adding and removing people and the results are the same and no consistent.

Help please!!!!!